A study of the variation of the surface roughness lengths at Risø, Denmark
The Risø data were analyzed for variations in the surface roughness lengths. The method of analysis was tested on the Wangara data and proved satisfactory at this homogeneous site. Annual mean surface roughness lengths were determined for three wind speed categories and three stability categories. T...
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| Language: | en_US |
| Published: |
2012
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| Online Access: | http://hdl.handle.net/1957/29301 |
| Summary: | The Risø data were analyzed for variations in the surface roughness
lengths. The method of analysis was tested on the Wangara data
and proved satisfactory at this homogeneous site.
Annual mean surface roughness lengths were determined for
three wind speed categories and three stability categories. The decrease
in surface roughness length with increasing wind speed and
decreasing stability was large but not generally statistically significant
because of the large dispersion in the data. The annual mean
roughness length varied over several orders of magnitude.
These results and also the ten year mean profiles were compared
with those of previous investigators.
It was found that the standard deviation determined from mean
annual profiles over a ten year period was greater than one order of
magnitude. === Graduation date: 1975 |
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